Check that runsystem script exists before trying it.

* init/init.c (launch_something): Check with file_name_lookup that runsystem
script exists before calling start_child.
* daemons/console-run.c (main): Check with file_name_lookup that runsystem
script exists before opening a console for it.

1 files changed, 7 insertions, 0 deletions

diff --git a/daemons/console-run.c b/daemons/console-run.c
index aaa1159b..fb879e53 100644
--- a/daemons/console-run.c
+++ b/daemons/console-run.c
@@ -49,6 +49,7 @@ int
 main (int argc, char **argv)
 {
   mach_port_t consdev = get_console ();
+  mach_port_t runsystem;
   char *consname;
 
   if (consdev == MACH_PORT_NULL)
@@ -62,6 +63,12 @@ main (int argc, char **argv)
   if (argc < 2)
     error (1, 0, "Usage: %s PROGRAM [ARG...]", program_invocation_short_name);
 
+  /* Check whether runsystem exists before opening a console for it.  */
+  runsystem = file_name_lookup (argv[1], O_RDONLY, 0);
+  if (runsystem == MACH_PORT_NULL)
+    error (127, errno, "cannot open file `%s' for execution", argv[1]);
+  mach_port_deallocate (mach_task_self (), runsystem);
+
   if (open_console (&consname))
     setenv ("FALLBACK_CONSOLE", consname, 1);